Magnetic Field Observations: Voyager 2 in the Distant Heliosheath during 2017 and 2018, Voyager 1 in the VLISM during 2013-2019

Voyager 2 (V2) observed the magnetic field B from 2017 to day 218, 2018, when it reached the magnetic barrier in the outermost region in the heliosheath. Several merged interaction regions were observed, with the magnetic field strength B as high as 0.3 nT compared to the average of B = 0.14 nT. The observations were made during the declining phase of the solar cycle, when V2 was in the sector zone. A sector structure was evident in the azimuthal angle, but there were large deviations of the elevation angle from the Parker spiral angle δ = 0° during long time intervals, which are not understood. One such interval in 2017, which separated two very broad sectors, contained multiple sector boundaries crossings, possibly indicating that the current sheet was close to the latitude of V2. The temporal variations of the BR, BT, and BN components of B and B on a scale of one day were intermittent. The kurtosis for daily increments was largest in the compressible BT component, namely 6.0 and 7.2 in the heliosheath during 2017 and 2018, respectively. Voyager 1 observed significant intermittency in the BN component in the VLISM from 2013 through 2019, indicating the dominance of transverse Alfvenic turbulence throughout the VLISM observed to date. The distribution functions of the increments of the components and the magnitude of B are accurately described by the q-Gaussian distribution function, which was observed over a wide range of scales in the heliosphere, the heliosheath, and the VLISM.